Hydraulic power unit



March 8, 1938.

HYDRAULIC POWER UNIT July 3, 1955 Filed 4 Sheets-Sheet l I Z3 7' P 17 4/ In 0 m. DJ o 0 Q I 0 I215 f a 7Q I -lnvenlor Z0. 0 w G O O u z'llz' am A! Edwards A ttorney March 8, 1938. w. N. EDWARDS 2,110,393.

HYDRAULI 0. POWER UNIT Filed July 3; 1935 4 Sheets-Sheet 2 Invenlor I Vz'l la '02? N Edwards A llorney March 8, 1938 w M EDWARDS 2,110,393

HYDRAULI C POWER UN IT Filed July 3, 1935 4 Sheets-Sheet 3 liven Z07: Wan/1M Minn mew.

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Filed July 3, 1935 4 Sheets-Sheet 4 A Home];

Patented Mar. 8, 1938 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to windmills andmore particularly to a pump jack, and an object of the invention is to improve over the present type geared windmill and pumpjack therefor.

Inaccordance with the present invention hydraulic means is connected between the windmill and the pump rod for operating the latter whereby the pump will have a high maximum of water lifting power.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein Figure 1 is a side elevational view of a windmill embodying the features of the present invention.

Figure 2 is a fragmentary top plan view of the pump jack with certain parts removed.

Figure 3 is a horizontal sectional view taken through the pump' jack.

Figure 4 is a vertical sectional, elevational view of the power cylinder. v

Figures 5 and 6 are detail views taken sub stantially on the lines 5-5 and 6-6 respectively of Figure 2..

Figure '7 is a fragmentary plan view of a valve equipped head plate.

- Figure 8 'is a detailsectional view through one of the pistons of the pump jack.

Figure 9 is a perspective view of a valve operating rod.

Figure 10 is an end elevational view of a valve.

Figure 11 is a sectional view through the valve.

Figure 12 is a plan view of the valve core.

Fig. 13 is a schematic view showing the pump, motor, valve and hydraulic circuit.

Referring to the drawings by reference numerals it will be seen that 5 indicates generally the tower of a windmill, while 6 indicates generally the wind wheel. The pump rod is indicated by the reference numeral 1.

Mounted as at 8 on the tower 5 for rotation in a horizontal plane is a fluid tight casing 9 forming part of the pump jack. A wind vane ll 0 is rigidly fastened to casing 9 as at ill to swing the fan fixed into the wind.

Mounted in the casing 9 is a cylinder block I2 in the cylinders of which operate the pistons l3. For the block l2 there are provided cover 0 plates 14, and substantially closing one end of the cylinders of the block [2 is a head plate l5. Secured to the head plate is a manifold chamber I6 which together with the head plate l5 are secured in position by suitable bolt means ll.

Provided in the head plate l5 for each of the cylinders, and connecting each cylinder with the chamber I6 is a port l8 which at one end is formed to provide a valve seat l9. Suitably seas shown in Figure 8 with a port 23 formed at one end to provide a seat for a poppet valve 24. Valve 24 is provided with a stem and operates through the hub of a guide spider 25 and a spring device 26 serves to normally retain the valve 24 in seated position.

The pistons l3 are provided with connecting rods 21 that at one end are provided with bearlugs 28 embracing eccentric disks 29 on a shaft 30. (See Figures 2 and 5.)

The shaft 30 is journaled in bearings 3|, 32 provided on opposite sides of the casing or housing 9 as shown in Figure 2 and on one end of this'shaft is mounted the wind wheel 6.

From the above it will be seen that oil within the casing 9 will, on the outward strokes of the pistons 13, pass inwardly through the open ends of the cylindersof the block l2. As the pistons l3 move outwardly on the intake strokes, valve 24 moves to open position so that the oil flows through the pistons. I strokes of the pistons, valves 24 close and the oil under pressure is forced through the passages l8, valves 2| opening to permit the oil to pass into the chamber l6.

From the chamber IS the oil under pressure is delivered through a pipe 3| and into the casing of valve 32 through the port 33 on the casing and with which the pipe 3| is connected.

On the return pressure In a manner hereinafter more fully set out the oil under pressure is delivered through the valve 32 to a vertical power cylinder 34 to reciprocate the piston 35 operating within said cylinder 34. The piston 35 is provided with a rod 36 which through the medium of a suitable coupling (not shown) is connected with the pump rod I for operating the pump. The cylinder 34 is supported on a suitable standard 31 within the casing 9..-

Arranged in the casing of the aforementioned valve 32 is a valve core 38 provided with through ports 39 and 40 respectively having flared ends 39d and 40a respectively.

The valve casing 32 is also provided with ports 4|, 42 and a manifold chamber 43 equipped with a port 44.

As best shown inFlgure 4, port 4| is connected with the cylinder 34 at the bottom of the cylinder through the medium of a suitable conduit or piping 45. Port 42 is connected with the'cylin-' der 34 adjacent the top of the cylinder through the medium of a suitable piping or conduit 46.

,Connected with the port 44 is an exhaust or reinaiter set out and passage 40 is in registry with ports 33 and 42 the pumped oil will pass through the valve and the conduit 44 into the cylinder 34 above the piston 35 to cause a downward movement of the piston.

In connection with the above and as clearly shown in Figure 4, when for example, the piston 35 is on its upstroke, oil in the cylinder 34 above 7 'the piston will be forced from the cylinder 34 through the conduit 46, port 42, and the valve thereof, and from this chamber through. port conduit 41 back into the casing Q. is continuously being used over and again. Also,,the oil will aerve to-luhricate workingpartsof the'device.. l 'br piston mail at one endasat u. The rod or u isf'providedwith an'jelonaated-slot so ranged stops provided on one end of the valve casing. For releasably retaining the valve 38 in either oi its two positions there are provided suitable spring devices I; as shown in Figure which are pivoted at the outer end to the valve casing and secured at theinner end -to lateral projections on opposite sides of the axis of whereby when the springs are ofl dead center they will move the'arm with a snap action.against either one or the other of the stops 42 depending upon the direction in which the arm is initially moved by the rod 48.

From the above it will be seenfthat as, for example, the piston moves upwardly, the, lower "endofthe'slot llwillenaagethecrank'armll of the valve and swing the same from .the full line to the dotted line position suggested in; l'igure 4 thus closing oi! passage 34 and moving pas sage 44 into registry with the ports .88 and 42 as the piston I reaches the limit of its upstroke.

With the port 44 in registry with the ports I! automatically operatingthevalve vided-a valvierod 48 that is connected-with the and oil supply a,11o,soa

and 42 the oil will then flow to the top of the cylinder 34 to act on the piston 35 to cause a downward movement thereof. As the piston 35 completes its downward movement the upper end of the'slot 54 engages the arm 5| moving the same from the dotted line position in Figure! to the full line position shown in said figure and thus places the valve core 38 in the position shown in Figure 11 so that the cycle of operation may be repeated.

cushioning the downward stroke of the piston I there is suitably connected with the cylinder 34 an air bulb or anti-knock device 54. It is thought that a clear understanding oi the operation, construction and utility and advantages of the invention will be had from the above, and that I have provided a positive and efllcient hydraulic means for driving a pump from a wind wheel.

Having thus described the invention, what is claimed as newis:

1. A hydraulic transmission comprising a' substantially closed liquid. tight oil supply casing mounted to turn upon a vertical axis,'a rotatable shaft within and adjacent one end of said casing and extending crosswise thereof and through -a sidewall 01' the casing for connection with a prime mover, a plurality of longitudinally ex -tending fluid pressurepump units of thereciproeating piston type disposed adjacent the opposite end of'the casing and opened at their respective inner ends to the liquid of the'casing, a common discharge manifold for said pump units at the outer end thereof, means operatively connecting said pumpumit's with the-rotatable shaft foreperating said units upon rotation. of the shaft, 2. fluid pressure operated motor .of the recipro-' catingpistontypeextendingverticallyandcenw 'trally of.the casing between'said shaft and said pump units and conentrically with the vertical axis of the casing, and a hydraulic transmision circuit between said fluid pressure motor, manifold and oil supply casing.

2. A hydraulic comprising a sub-' stantially closed liquid-tight oil suppl casing, a rotatable shaft within and adjacent one end of the casingand adapted for connection with a prime mover, afluid pressure pump of the reciprocating piston type disposed adjacent the opposite end of the casing and opened at its inner end to the liquid oi the casing, a discharge I manifold for said pump unit at the outer end thereof, connection means between said shaft and pump unit for operating the latter by movement of the shaft, a fluid pressure operated motor of the reciprocating piston type extending vertically of the casing between said shaft and pump unit, and a hydraulic transmission circuit between the said fluid pressure motor, manifold,

; N'. isnwsans." 

